baber/WOPTO huggingface dataset:
Patent GB-762717-A (GB)
Title: Method of removing silica from alumina-containing substances having high silica contents
IPC: C01B33/00
Filed: 1954-09-17
Abstract: Silica-rich alumina - containing substances such as clays or inferior bauxite calcined at 900-1100 DEG C. are treated with a caustic alkali solution containing by weight more than 20 per cent of alkali metal hydroxide at between 70 DEG C. and the boiling point at atmospheric pressure for 15-30 mins., silica being thereby removed as alkali metal silicate.  The product may be treated under the same conditions with a 2-10 per cent alkali metal hydroxide solution further to reduce the silica content and if desired either or both of the resultant solutions may be treated with lime and/or magnesia, hydrated if desired, separated from the precipitate and recycled. About 0.5-2 mols, preferably 1 mol of Na2O (&c.) is required per mol of SiO2 for the two stages.  The product of the invention may be used in the Bayer or sinter decomposition process or combinations thereof. Examples are given in which the preferred conditions-calcination at 1000 DEG C. for 1 hour, and leaching with 30 per cent caustic soda-are employed as a result of which products containing about 70 per cent alumina and 20 per cent silica (from clays) or 55 per cent alumina and 5 per cent silica (from bauxite) are obtained.  It is stated that by precalcination at 1000 DEG C. followed by treatment with 10 per cent caustic soda solution, it is only possible to reduce the silica content of clays to that of sillimanite, i.e. to a molar ratio of 1:1.
Patent GB-392807-A (GB)
Title: Improvements in and relating to electric discharge devices
IPC: H01J61/92
Filed: 1932-09-29
Abstract: 392,807. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Found, C. G. ; 1190, Phoenix Avenue, Schenectady, New York, U.S.A.) Sept. 29, 1932, No. 27066. Convention date, Sept. 30, 1931. [Class 39 (i).] A compound thermionic cathode, particularly for a lamp, consists of members arranged in heatinterchanging relation to one another, and means are provided for dividing the load current in a predetermined ratio between the members. As shown in Fig. 3, the cathode consists of an outer shell 13, provided with apertures 14, and enclosing a shell 18 having an internal heater 19 of tungsten supported on a core 20 of alumina or thoria. The inner surface of the shell 13 and the outer surface of the shell 18 are coated with barium oxide. The lamp contains neon, mercury vapour, a mixture of neon with argon or krypton, or a mixture of mercury and argon at a pressure of 1 to 10 mms. One end of the heater 19 is connected with the shell 18 and the other with a lead 49. The outer shell is connected with the lead 49, and through a winding 53 and a resistance 51 with the negative of the supply. The shell 13 is thus at a potential negative to that of the shell 18, and the division of current between the shells depends on the resistance of the heater 19. The positive of the supply is connected through a switch 56 and a resistance 57 with the shell 18. The switch 56 is connected by a link 58 with a lever 59 carrying the armature 65 of a winding 53 and a mercury switch 54, which is connected through a resonance 61 with the switch 56, and through a resistance 63, shunted by a thermal switch 62, with the winding 53. When the switch 56 is closed, current passes through the heater 19, and the concurrent closing of the switch 54 causes the thermal switch 62 to be closed after an interval by heat from the resistance 63, causing the winding 53 to be energized so as to attract the armature and open the switch 56. The de-energization of the winding 53 superposes an inductive kick on the supply voltage and starts the discharge. In the alternating current lamp shown in Fig. 1, the division of the current between the shells is determined by an adjustable resistance 26 connected between them. The starting circuit 31, 37 includes the winding 32, mercury switch 35, thermal switch 38, and heating resistance 39, and is energized from a transformer 28. When the thermal switch 38 closes, the winding attracts the armature 33 and rocks a lever 34 so as to open the switch 35 and a switch 36 in the cathode heating circuit ; or the switch 36 may be omitted, and the cathode heater energized during operation of the lamp.
Patent GB-878332-A (GB)
Title: Nuclear reactor control
IPC: G21C7/16
Filed: 1959-08-07
Abstract: 878,332. Nuclear reactors. UNITED STATES ATOMIC ENERGY COMMISSION. Aug. 7, 1959 [Aug. 7, 1958], No. 27070/59. Class 39(4). Means for driving a control rod comprises a piston connected to the control rod and slidable in a cylinder, a source of fluid pressure connected to the cylinder above the piston and to part of the area below the piston, another part of the area below the piston being connected to the pressurised coolant of the reactor, and means for relieving the pressure above the piston under fault conditions to allow the control rod to be driven into the reactor. In the Figure the control rod (not shown) is attached to a rod 20 driven by a piston 16, the lower end of which rests on a nut 34 which can be moved axially by a screw 32 driven by an electric motor, rotation of the nut being prevented by a key sliding in a groove in the cylinder 18. Cylinder 18 is divided into two parts by a seal 26; hydraulic fluid under pressure is supplied to the top part on each side of the piston by pumps from a reservoir 46. The pressurised gaseous coolant of the reactor, which may be helium or carbon dioxide, is supplied to the lower part of the cylinder through a cleaning system 41 and gas/oil separator 40. Under emergency conditions it is arranged that the normally open valve 71 is closed and the normally closed valve 74 is opened allowing the hydraulic fluid in the cylinder above the piston to flow back into the reservoir so that the control rod is pushed into the reactor by the gas pressure and the hydraulic fluid pressure acting below the piston. Either the gas or the hydraulic fluid acting alone should be able to accelerate the control rod. To guard against failure of the hydraulic system an accumulator tank 52 pressurised by gas may be included in the circuit. Preferably the electric motor turning the screw 32 is operated on emergency shut down so that the drive nut 34 follows the piston to its uppermost position.
Patent GB-1342027-A (GB)
Title: Production of reducing gas
IPC: C01B3/38
Filed: 1971-04-19
Abstract: 1342027 Making combustible gas PULLMAN Inc 19 April 1971 [22 Sept 1970] 27121/71 Heading C5E Reducing gas containing at least 88 mol. per cent H 2  is made by contacting a hydrocarbon feed with steam over a steam-reforming catalyst which contains at least 0À5 wt. per cent, and preferably 2 to 20 wt. per cent calcenated as the metal, of added active alkali metal or alkaline earth metal compound, at elevated temperature and at a pressure in the range atmospheric up to 250 p.s.i.g. and a steam to carbon ratio not exceeding 1À5 : 1, and contacting the partially reformed gas so produced over a steam-reforming catalyst free from added active alkali metal or alkaline earth metal compound. The reaction is carried out in an externally heated tubular reactor, one catalyst being superimposed on the other, and H 2 -rich spent gas from a reduction zone may be recycled to the reactor. Feedstocks include natural gas and CH 4 -rich cracked refinery gases, and may contain acetylenes and diolefins. Outlet temperatures are at least 1225‹ F. in the first stage, and at least 1750‹ F., preferably in the range 1800‹ to 2100‹ F., in the second stage.
Patent GB-289342-A (GB)
Title: Violin or stringed musical instrument sound post grips
IPC: G10D3/02
Filed: 1927-10-13
Abstract: 289,342. Symmons, J. Oct. 13, 1927. Stringed instruments, sound-post setters for.-A sound-post setter for violins &c. comprises a pair of bent lever-arms 1, 2, detachably pivoted together at 6 and each carrying by a pivot 9 a semi-tubular jaw 10. When closed to grip a sound-post 11, the arm 2 nests within the arm 1, being thus prevented from detachment at the pivot pin 6.
Patent GB-1341949-A (GB)
Title: Disc brake
IPC: F16D55/228
Filed: 1972-06-12
Abstract: 1341949 Disc brake; shoe cylinders BENDIX CORP 12 June 1972 [28 June 1971] 27286/72 Headings F2E and F2F The disc 34 of a vehicle disc brake has opposed annular braking surfaces 40, 42 engageable by respective friction pads 64, 66, the friction pads 64, 66 having a radial width "A" greater than the radial width "B" of the surfaces 40, 42; there is therefore a radial overlap of the pads 64, 66 at both the inner radii "C" and the outer radii "E" of the surfaces 40, 42 and in use of the brake an axial overlap "K" develops. This arrangement acts to maintain the disc free of corrosive contaminants and is also said to suppress brake squeal. As shown, the pads 64, 66 are applied by opposed pistons 50, 52 working in bores 54, 56 of a caliper 44. The caliper 44 is attached to a mounting bracket 10 secured to a flange 12 of a front wheel steering knuckle. The caliper 44 has an hydraulic inlet port: 62 and the bores 54, 56 are interconnected by a tube 58.
Patent GB-172167-A (GB)
Title: Improvements in starting and lighting systems for use on motor vehicles
IPC: F02N11/04
Filed: 1920-09-25
Abstract: 172,167. Soc. Anon. des Anciens Etablissements Hotchkiss et Cie, and Ainsworth. H. M. Sept. 25. 1920. Turning-gear.-In a motor vehicle, an electric starting-motor serving also as a lighting dynamo is carried by the change-speed gear-box and drives a plate which rotates always with the .engine fly-wheel. In the form shown, the motor C is housed in a casing B on the side of the gear-box A and is connected by sprocket gearing K to a chain-wheel F, which is secured to a sleeve E freely mounted on the clutch shaft D. On the sleeve E is splined the hub H<2> of the clutch presser plate H. The gear-box is attached to the engine Z by a wall M enclosing the clutch and the chainwheel F and having a slot for the chain and a partition N for retaining lubricant. The chain-wheel L on the motor is enclosed by a cover P.
Patent GB-301600-A (GB)
Title: Improvements in or relating to dashpots employing liquid as a damping medium
IPC: G01G23/08
Filed: 1927-10-15
Abstract: 301,600. Avery, Ltd., W & T., and Taylor, J. W. Oct. 15, 1927. Dashpots.-Liquid dashpots used in connection with weighing machines are delivered to the user with the liquid contained in a sealed reservoir which is associated with the dashpot cylinder in such a way that the user is able, by a simple adjustment, to transfer the liquid to the cylinder for use therein. The piston and cylinders, not shown, work in the dashpot cylinders 8, the cylinder being shown in Fig. 2 filled up ready for use. The lower end of the cylinder is formed with an extended flange 8<d>, the edge of which is screwed to engage a cylindrical reservoir 11, which may be screwed down into the position shown in Fig. 4, the liquid being thereby transferred to the reservoir through the passages 8f, 8e. Felt or other washers 12 then seal the reservoir. A second washer 13 prevents leakage when the apparatus is adjusted for working. The reservoir may slide on the flange 8<d> instead ot being screwed thereto.
Patent GB-206508-A (GB)
Title: Improvements relating to supports for electric motors driving spinning machinery
IPC: D01H1/20
Filed: 1923-11-01
Abstract: 206,508. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Guildford, C. T.). Nov. 3, 1922, [Convention date]. Driving - arrangements.-A support for a vertically arranged electromotor 11 for driving a spinning-machine comprises a base member on which the end frame 4 of the machine is ad- ;ustably mounted by screwed studs 5.
Patent GB-1069407-A (GB)
Title: Eye-testing apparatus
IPC: G02B21/08
Filed: 1964-07-03
Abstract: 1,069,407. Ophthalmoscopes. R. RODENSTOCK [trading as OPTISCHE WERKE G. RODENSTOCK]. July 3, 1964 [July 11, 1963], No. 27615/64. Heading G2J. An ophthalmoscope comprises an observing device 13, a substantially linear light source 7, a back reflecting system including a mirror 12 for forming an image of the source 7 adjacent and parallel to the source, and an optical system for producing a flat light beam from the source, the mirror 12 being mounted so as to be readily removable and replaceable in order to decrease or increase the brightness of the light beam. The observing device, for example a microscope, is provided with at least one objective co-operating with a diaphragm having a slit aperture of variable width orientated parallel to the plane containing the light beam entering the patient's eye. When the mirror 12 is absent a filamentary flash bulb 10 is imaged adjacent the source 7 so as to provide a high intensity of illumination when photographing the eye.
Patent GB-173835-A (GB)
Title: An improved method of and apparatus for producing condition and head of draught beer
IPC: B67D1/04
Filed: 1920-09-30
Abstract: 173,835. Scott, W. Sept. 30, 1920. Dispensing liquids. -The proper condition and head is produced in ordinary draught beer by adding thereto a small quantity of specially prepared ale of a similar class which has been specially treated and stored to ensure a high pressure and a large quantity of carbon dioxide gas in solution. The receptacle 1 containing the high-pressure ale is placed near the beer engine and is connected by means of a pipe 7 to an outlet tap 5 provided preferably near the outlet 6 from the beer engine, the tap being opened by means of a lever 12, which may be operated by an upward movement of the glass when necessary. In a modification, the pipe 7 is connected direct to the beer pump, a suitable non-return valve being fitted in the beer-supply pipe to prevent high-pressure ale from passing to the barrel containing the ordinary beer.
Patent GB-1282212-A (GB)
Title: Control apparatus for a windscreen wiper and washing installation of an automotive vehicle
IPC: B60S1/48
Filed: 1970-06-09
Abstract: 1282212 Windscreen cleaning systems SWF-SPEZIALFABRIK FUER AUTOZUBEHOER GUSTAV RAU GmbH 9 June 1970 [14 June 1969] 27744/70 Heading A4F [Also in Division H2] Control apparatus for a windscreen wiping and washing installation, comprises a multi-  track electric switch S1, S2, S3 settable in positions r1 to r4 for intermittent operation of an electric windscreen wiper motor at progressively decreasing time intervals, in positions r5 and r6 for continuous wiper motor operation at two different speeds, and a position γ o  in which the wiper motor is de-energized, and a valve 20, Fig.3 (not shown) controlling the supply of washing liquid is operable by a push button mounted in the rotary shaft by which the switch S1, S2, S3 is manually operated. The intermittent operation of the wiper motor is controlled by a multivibrator comprising transistor T1, T2, the period between the output pulses of which is determined by the time constant of a capacitor C2 and a variable number of resistors R3 to R6 selected by the setting of the switch contact S1. The output of the multi-vibrator energizes a relay SR to actuate contacts Sr1, Sr2 to apply a positive voltage either to the wiper motor terminal 53 via the switch contact S3 when the latter is in positions r1 to r5, so that the motor runs at the lower speed, or to the wiper motor terminal 53b when the contact S3 is in position r6, so that the motor runs at the higher speed.
Patent GB-295862-A (GB)
Title: Improvements in the method of and apparatus for the manufacture of metal tubs or the like
IPC: B21D37/20
Filed: 1927-10-20
Abstract: 295,862. Butterfield, Ltd., W. P., and Wood, F. Oct. 20, 1927. Corrugating. - A metal cylinder for forming tubs &c. is corrugated between a pair of rolls having central longitudinal corrugations R and peripheral end corrugations R<1> the top roll being pivoted at one end at B<1> so that it can be swung out of position for insertion of the cylinder. The rolls may also have flanges R<2> distanced from the central part by washers. The roll may be built up from various corrugated sleeves mounted on a central shaft. The upper roll is adjustably mounted on a bracket by a cross bar C carrying cylinder guiding pulleys G, G<1>, G<2>, the latter receiving a flange, if any, on the cylinder. The other end bearing can be swung with the roller out of its housing B<2>. The rolls are intergeared.
Patent GB-647163-A (GB)
Title: Improvements in or relating to presses for use in piercing material, and piercing devices therefor
IPC: B21D28/24
Filed: 1947-10-17
Abstract: 647,163. Punching. REDMAN TOOLS & PRODUCTS, Ltd., FROST, A. F., and REDMAN, A. M. Oct. 17, 1947, Nos. 27897/47 and 17074/48. [Class 83 (iv)] A piercing unit for use in a press comprises a punch, a sleeve surrounding and concentric with the punch and supporting a stripper and a stripping spring surrounding the punch and bearing at its lower end on the stripper and at its upper end on a shoulder of the punch. In one form, Fig. 1, a punch 20 is housed within a tubular member 12 having at its lower end a stripper bush 28 and at its upper end an apertured plate 34 serving to guide the upper end of the punch. The punch is normally held in retracted position by a helical spring 38 bearing on the bush 28 and on a washer 36 secured around a neck 24 in the punch. The housing 12 is mounted in an opening in the upper arm of a U-shaped frame 8 by means of screws or studs 16 so as to be movable axially within the frame. It is normally urged to its upper position by a lighter helical spring 46 bearing between the upper part of the frame and the bottom of a flange 14 at the top of the tubular housing. The punch is in alignment with a die 50 mounted in boss 48 upstanding from the lower arm of the frame 8. A curved passage 54 in the boss serves to discharge the punched-out slugs. The frame 8 is adapted to be accurately positioned on the bed of a press by means of a recess 58 co-operating with a pin on the bed and to be clamped by a bolt passing through an elongated slot 56 in the frame. On the descent of the press ram, the housing 12 is first moved down bodily against the action of the spring 46 so that the bush 28 engages the work or until the limit of its movement is reached and then the punch descends relatively to the housing to pierce the work. In a modified form, the member 12 and the die 50 are carried by separate arms instead of by, a complete U-frame. In another modification, Fig. 4, the upper part of the punch 90 is a close sliding fit within a tubular housing 74, the heavier spring 102 bears between the top of the housing and a head 88 on the punch while the lighter spring 104 bears at its lower end on the top of the frame 8 and at the top is anchored to the tubular member 74. A screw or pin 112 carried by the member 74 projects into a slot 100 in the punch. Alternatively, the lower end of the spring 104 may be anchored in a bayonet slot in the member 74 and itself project through into the slot 100 in the punch as shown in Fig. ,7. A number of frames containing punch housings and dies may be bolted to a false bed which is in turn bolted to the bed of a press so that a number of holes may be pierced in the work by a single movement of the press ram. Alternatively a number of punch housings and dies may be mounted in a single elongated. frame. Any punch housing may readily be replaced by another having a punch of a different size if a different-sized hole is required.
Patent GB-503686-A (GB)
Title: Improvements in and connected with motor car bodies
IPC: B60J7/043
Filed: 1937-10-14
Abstract: 503,686. Vehicle opening-tops. PARK, WARD, & CO., Ltd., THOMPSON, N. A. D., and PAGAN, J. W. Oct. 14, 1937, No. 27970. [Class 108 (i)] In a motor vehicle roof having an opening closable by a sliding panel A, Fig. 1, adapted to be guided into a housing beneath the rear fixed portion B, the panel. is mounted so that, for operating purposes, its front and raar ends may move substantially in a vertical plane, while on each side towards the'rear it is provided with small segments 3,Fig. 5, which are retractable inwardly and upwardly so as to reduce the effective width and depth of the panel in its housed position. As shown, the panel A and fixed framework are provided respectively with co-operating guides 1, 2, and, to provide for the necessary lifting movement of the rear edge of the panel as it reaches its closed position, the panel is pivoted about horizontal pivots 5 on the guides 1. Additional guides 40 prevent rocking of the panel on the pivots during its advancing or retracting movements. When the panel A is housed, a hinged lid 10 at the forward edge 11 of the housing 12 closes the housing, while in the advanced position of the panel the lid assumes an inclined position, Fig. 8, in which it is locked by bolts 29, Fig. 3, coacting with recesses 28 on hinged extension pieces 10a of the panel. The lid 10 is provided with plates 15, Fig. 2, which, as the lid is opened, coact with pivoted levers 18 to push the segments 3 downwardly and outwardly to complete the contour, of the vehicle roof, while, on closure of the lid 10, springs 20 retract the segments. The lid 10 is also connected by means of a double hinge 50 with a sliding plate 51 having a cam surface 52 which, as the lid is opened, engages a pawl 57 and tilts a retaining catch 54, releasing the panel A and permitting springs 46 to project it out of the housing. When the panel is again pushed into the housing and the lid 10 closed, the plate 61 is slid rearwardly and the catch 54 once more retains the panel.
Patent GB-1020271-A (GB)
Title: Fuel oil burner
IPC: F23D5/00
Filed: 1964-07-07
Abstract: 1,020,271. Burners. B. KOHLI. July 7, 1964 [July 10, 1963], No. 28013/64. Heading F4T. A fuel oil burner has an air inlet 14 terminating in an apertured conical part 9 projecting into an oil pan fed from a regulator 7. The pan is provided with a shield 8 and a pair of nesting members 31, 35 which are rotatable by the knurled knob 43. The members 31, 35 are provided with helical slots 33, 37 engaging pins 38, 40 secured to the oil pan so that rotation of the knob 43 raises both members and rotates one with respect to the other. The inturned edges 46, 47 of the members 31, 35 are notched so that partial rotation will decrease the space between these members and the cone 9.